I can write commands to my RS-232 device and change settings but cannot read data

[floaters]

The Knight was right!

the cable was incorrectly connected

[lamp]

Hi Floater,

I have the same problem you had: tti1906 with serial connevtion, but no LabView Driver. Could you share your driver and save me some work?

Thanks.

[Velocity]

Hello.

I also have the same problem: I can write commands to my RS-232 device (TTI 1906 multimeter) and change settings but cannot read data (erorr when i read datd is - VISA:  (Hex 0xBFFF003E) Could not perform operation because of I/O error)....

I tried to solve this problem as is written here:

http://digital.ni.com/public.nsf/allkb/60DDFED7EFEFE7188625705700750821?OpenDocument

And get  new error: VISA:  (Hex 0xBFFF0015) Timeout expired before operation completed.

Help me please!

[Dennis_Knutson]

Are you sure the instrument is responding to the commands or are you assuming that the writes are working because you don't get an error? You will seldom get a write errror - even if there is no connection.

In any case, don't even bother writing any code until you debug the com settings and cable in a program like Hyperterminal.

[Velocity]

I'm sure that device receives commands, bacause, for example, i can change settings like voltage measurement, resistance measurement and so on.

I tried to connect from Hyperterminal, but i couldn't send any command and device peak all time, when i did it.

[floaters]

Hi,

I encountered this problem. You ought to check your cable connection. If you look at the manual of TTi multimeter, you will see that the data read pins for the TTi are slightly different from the conventional RS232, as a result of which, you are unable to read data. I suggest you get your TTi cables  custom wired according to the connections specified in the manual.  This should solve your problem

[Velocity]

Hello, floaters.

Thank you for answer.

Could you tell me where i can buy or orar this cable?

 

[floaters]

Hi,

You can get it done by any electronic components vendor. There are several stores selling wires, circuit boards, connectors and they generally have a technician to help you solder the connections. Alternatively, you can solder it yourself

[Velocity]

But how is it the name of this cable?

[Velocity]

And, by the way, did you write your driver?

If yes ´- can you share? 🙂